Fig. 6From: Feasibility analysis of GNSS-based ionospheric observation on a fast-moving train platform (GIFT)The geomagnetic indices, i.e. Kp (a), Dst (b), and solar index F10.7 (c) in June 2017. The red vertical dashed line denotes the experiment time at 16:00 HKT on 19 June 2017Back to article page